Interactive Learning: Twenty Years Later

It is always interesting to read what one has written many years ago. In this case the paper was initially given as an invited lecture to the American Association of Physics Teachers, the Millikan lecture. Then it was reprinted with several other papers of mine in Robert Taylor’s book, (The Computer in School: Tutor, Tool, Tutee, 1980) in the section that discusses the use of the computer as a tutor.